Continuous layboy



June 25, 1940. G. E LAMB CONTINUOUS LAYBOY Filed July 5, 1938 13Sheets-Sheet l INVENTOR 650 65 f.' fi/wa ATTORNEY me 25, 1940. G. E,LAMB 2,205,767

CONTINUOUS LAYBOY ATTORNEY June 25, 1940. G, E LAME 2,205,767

CONTINUOUS LAYEOY 13 Sheets-Sheet 4 Filed July 5, 1938 xNvENToR61E-@R655 AMB ATTORNEY Filed July 5, 1938 13 Sheets-Sheet 5 www NVENTORBY Q6 ATTORNEY June 25, 1940. G. E LAMB CONTINUOUS LAYBOY Filed July 5,1938 13 Sheets-SheetI 6 RM Y m N .mbA M t E MO as .v [QN Nm Nm H @wwwman m HH -..u S m .w Km NGN L W Q \m @n m wm, 0 Y T ,wm 6 B wd Nm mv ,tm. '9m .Nw 1 Il I||| I n Q m w ,NW\- \%k .Wl NM. .Wk m

June 25, 1940. G. E. LAMB CONTINUOUS LAYBOY Filed July 5, 1958 13Sheets-Sheet 7 NN mm mm. \Dv wwf MW A m. om @V E R. mw Nm QW.

` Nw mm mm mw nm N QN @1 Y E N R O n A June 25, 1940., G E LAMBCONTINUOUS LAYBOY Filed July 5, 1938 13 Sheets-Sheet B w kom, R5 E@ mwINVENTOR @0R65 .ELA/V15 8% I ATTORNEY Jam@ 25, fll G. E. LAMB CONTINUOUSLAYBOY 13 sheets-sheet 9 Filed July 5, 1938 INVENTOR G50/Maf Am/f5 m mir ATTORNEY 13 Sheets-Sheet l0 tsv G. E. LAMB CONTINUOUS LAYBOY FiledJuly 5, 1938 Jung 25, 1940.

INVENTOR @fa/Paf A4/ms WNW 'BY/@f f ATTORNEY june 25, 1940. G, E LAMBCONTINUOUS LAYBOY Fi1ed July 5, 1938 13 sheets-she@ 11 INVENTOR 6EOA6AM5 BY @M/- ATTORNEY` June 25 '1940. Y G. E. LAMB 2,205,767

CONTINUOUS LAYBOY Filed July 5, 1938 13 Sheets' Sheet l2 ATTORNEY G. E.LAMB 2,205,767

CONTINUOUS LAYBOY Filed July 5, 1958 13 Sheets-Sheet l5 0 @wfg H1 [62 Tlzg/ 250 L# @4 327 33/ Ffm Si@ 305x@ 306 307) ass EMO BY f my@ ATTORNEYPatented June 25, 1940 UNITED, sTATEs PATENT OFFICE George E. Lamb,Hoquiam, Wash.

Application July E, 1938, Serial No. 217.46%

"i Claims.

This invention relates to improvements in layboys as used in pulpandpaper mills for the stacking of sheets of pulp or paper as they aredischarged from the trimming and cutting machines; the invention havingreference more particularly to continuous layboys and to a novelarrangement of supports or ilngers arranged therein, which areautomatically movable during an uninterrupted delivery of sheets fromthe ma chine, from a retracted position to an extended position, atwhich latter position-they will serve in lieu of the main table, toreceive and support the oncoming sheets during stack formation, ior aninterval of time during which a finished stach may beremoved from themain receiving table of the machine, and the latter then brought back toreceiving position.

Explanatory to the invention,'it will here be stated that layboys, asnow generally used, comprise a main receiving table onto which thesheets of pulp, or paper, as continuously delivered, are received inrapid succession to build up a stack. This receiving table is controlledby mechanism which causes it to move downwardly in accordance with thebuilding up of the stack there1 on, so that the top of the stack willremain substantially at the same level, at all times. Also, somepresent-day machines are equipped with catch ngers which are adapted tobe temporarily brought into position for catching the sheets of pulpthat are delivered while the table carrying a nished stack is lowered,the stack removed from the table, and the table then returned again toreceiving position; it being understood that as soon as the table isreturned to receiving position, the catch lingers, or temporarysupports, are retracted and the paper, as stacked thereon, is depositedon the table to form the lower portion of the next stack that is to bebuilt up.

The objectionable feature of such 1ayboys,as generally used, resides inthe fact that the catch fingers, or temporary supports` provide forreceiving only a limitednumber of sheets and this makes it imperativethat the main table be lowered, the finished stack removed and the tablereturned to receiving position before that limited number of sheets hasbeen delivered. Otherwise the stacking of sheets is disrupted.

In view of the undesirable result as above mentioned, and for otherreasons, it has been the principal object of the present invention toprovide a continuous layboy including the temporary fingers, but` alsoincluding mea-ns whereby the supporting frame carrying the fingers iscaused to travel downwardly in accordance with the rate (m. will-ddl ofbuilding up oi a stack thereon, thereby making possible the reception ofa far greater number oi sheets thereon and providing also a longerperiod of time for the lowering of the main table. the removal of astack therefrom and the return of the table to receiving position.

It is also an object of the present invention to provide means forquickly returning the main 4receiving table upwardly from unloadingposition to `an elevation at which it. will lift the partial stack,built up during unloading of the main table, and then automaticallyreverse its travel in accordance with the rate of building up oi thestack by the delivery oi sheets from the cutter, then eect a quickwithdrawal oi the fingers or temporary carrier and the return upwardlythereof to a neutral or retracted position until such time as againneeded.

Still further objects of the invention reside in the provision of meansfor controlling the actuation or operation oi the moving parts so thatthe action of the finger carrying frame, the main table, and the stackconveyor mechanism will all operate in a predetermined sequence andunder automatic control.

Still further objects ci the invention reside in the details oiconstruction, in the combination of parte, and in their mode ofoperation, as will hereinafter be fully described.

In accomplishing these, and other objects oi the invention, li haveprovided the improved details of construction, the preferred forms ofwhich are illustrated in the accompanying drawings, wherein- Fig. l is aside elevation of a continuous layboy embodying the present invention,showing the main receiving table loaded and'ready to start downwardlyfor unloading, and showing the temporary ngers extended to receivingposition and receiving the stach during the unloading period.

Fig. 2 is a view diagrammatically illustrating the relative positions ofthe mainV receiving table and unloading mechanism and the nger table,while a stach is being assembled on the table.

Fig. 3 is a similar view, showing the stack completed and the fingertable moved forwardly to a position for receiving the sheets oi pulpthereon in stack formation while the main table is :being lowered andthe iinished stack removed therefrom.

Fig. e is a view diagrammatlcally illustrating the downward travel ofthe nger table in accordance with the building up oi a stack thereonduring the unloading oi the main table.

lit)

Fig. 5 illustrates the return of the main :receiving table after a stackhas been removed therefrom, to a position for lifting the partiallyformed stack from the fingers of the finger table.

Fig. 6 is a central, vertical section taken longitudinallyfof thelayboy, showing the finger table retracted and the main table inreceiving position.

Fig. 7 is a vertical cross section, as. seen on the line 'I-'l in Fig.6; certain parts being removed for better illustration.

Fig. 8 is a plan view of the finger table assembly and various partsassociated therewith.

Fig. 9 is a rear end'view of the finger table assembly particularlyillustrating the'extending and retracting mechanism for the table.

Fig. 10 is a sectional detail of parts of the linger table as seen onthe line I Il-Ill inFig. 9.

Fig. 10a is an enlarged detail of the'stop adjusting means.

Fig. 11 is a plan view of the main receiving table.

Fig. 12 is a partial cross section as seen on the line |2-I2 in Fig. 6,particularly illustrating the transfer belts in lifted position foroperation.

Fig. 13 is a cross section on the line I3-I3 in Fig. 11, alsoillustrating the transfer belts lifted for operation. l

Fig. 14 is a shafting layout, in plan view, showing the various shaftsand their gear and sprocket chain connection for driving them.

Fig. 15 is a plan view of the table control switch mechanism for thecontrol circuit.

Fig. 16 is a vertical sectional view of the same on line I 6-I6 in Fig.15.

Fig. 17 is a vertical section of the same on line Il-I'I in Fig. 15.

Figs. 18 and 19 are details of the stack height control.

Fig. 20 is a wiring diagram of the control circuit.

Fig. 21 is a Wiring diagram of the power circuit as operated by thecontrol circuit.

The pulp trimming machine, which cuts the continuous pulp strip intosections or sheets, is not shown completely in the accompanyingdrawings, as it is not thought essential to a clear understanding of theoperation of the present layboy which, it is to be understood, isapplicable to various types of pulp trimmers, slitters and cutterswithout any material change.

It will also be stated that while the present layboy is applicable tothe stacking of sheets of pulp, cardboard, paper and the like, in thefollowing description it' will be described in connection with thestacking of sheets of pulp, but with the understanding that thedescription relates equally to the other uses.

The pulp, as it comes to the trimming machine, is in the form of acontinuous strip, usually eight, ten or more feet in width, and in thetrimmer, is trimmed along the edges, slit lengthwise into a plurality ofstrips of predetermined Width, and is then cut transversely to producethe rectangular pieces of standard size.

The present continuous layboy provides means for receiving these cutpieces from the trimming machine, and for delivering them successivelyupon the main receiving table, which is caused to be gradually loweredas the stack is built up thereon, and subsequently transferring thestack from the layboy when it is of a predetermined height. 'I'hislayboy also includes means for receiving the pieces of pulp during theunloading operation, on an extendable and retractable finger table,which is also lowered as the stackI is built up, while the mainreceiving table is transferring the completed stack. Means are alsoincluded to maintain the stacks in even alinement as they are built up,and completely automatic and continuous operation of the machine.

Referring more in detail to the drawings- The present layboy comprisesthe opposite side frames I0 and I I of heavy and substantial formation,spaced somewhat apart and suitably mounted on the floor in a base andjoined together by suitable members as will hereinafter be described.'Ihese frame members I0 and II are preferably formed of structural' andsheet iron, and are so formed as to house various gears, sprockets andchains, and to mount various shafts, as will be explained.

As seen in Fig. 1,a portion of a trimming machine is indicated, as atI5, and I6 'and I1 designate a pair of endless conveyor belts, betterillustrated in Fig. 6, which are propelled in the direction of thearrows placed adjacent thereto. These belts travel in the same directionand at the same speed, and the lower run of the belt I 6 and the upperrun of the belt I1 run in contact with each other for the advancement ofsheets of pulp between them for stacking. 'Ihe belt I6 is driven by aroller I8 in the layboy, and passes over a supporting roller I8 in thecutter, while the belt I1 passes over rollers I9 and I9 in the layboyand cutter respectively, and has direction al guide rollers I9a and I9bas shown in Fig. l. It will be noted that there are also guide rollers20 and 20a in the layboy that serve to guide the belts I6 and II intheir travel and change their direction slightly so that they grip thesheets of pulp therebetween more rmly and insure proper deliverythereof,

In Fig. 6, 25 designates the sheets of pulp being delivered to a stackby the belts I6 and Il, and it is to be understood that the sheets areall of the same size and follow, one after the other in rapidsuccession, and are'delivered from between these belts against verticalstops 26 which cause the sheets to fall into stacked formation. It isalso understood that the sheets of pulp are of a degree of rigidity orstiffness that prevents them from buckling up and causes them to fallreadily onto the stack.

Since the sheet delivery belts I6 and I'I have iixed or permanentpositions in the machine, and since it is not desired that the sheetsshall fall any appreciable distance to the top of the stack, it is thegeneral practice in layboys to elevate the receiving table at the startof a stacking operation, up to receiving position, then to cause agradual loweringthereof in accordance with the rate at which the stackis built up.

chine, as is illustra-ted best in Figs. 1 and f6," wherein 28designates, in its entirety, what istermed the main receiving table.This comprises a rectangular frame structure supported at its fourcorners by vertical screw shafts 29. Each shaft is revolubly mounted atupper and lower ends respectively in bearings 30 and 3|, and the severalshafts pass through threaded bearings 34 of lifting bars 35 of the mainreceiving table. Driving means, as presently described, is provided forrotating the four shafts in unison for the purpose of raising orlowering the frame, and this, insofar as lowering is concerned, iscontrolled by the feeding of sheets of pulp onto the stack.

In Order to impart a better understanding of the mode of'operation ofthe present layboy, it will here be explained 'that at the beginning ofa stacking operation, the main receiving `table 28 is elevated to itsupper limit. Then, as the stack of pulp is built up thereon by deliveryof sheets successively from the belts Il and I1, the

table is moved downwardly. under control of v means presently described,at such rate that the top of the stack remains substantially at the samelevel. After the stack has reached la certain predetermined height, alinger table, designated in its entirety by numeral 31, is extended intoa position so that its fingers extend horizontally acros'sthe top of thestack in position to catch the sheets of pulp thereon as delivered fromthe belts for an interval of time during winch the main table islowered, the stack removed there# from, and the table raised back toposition to lift the partial stack from the fingers and permit thefinger table to be retracted and then moved up to normal or startingposition.

In this operation, the linger table, like th main table, movesdownwardly as a stack is built up thereon and when the main table isreturned after being unloaded, toposition to receive the partial stackfrom the fingers, certain means is provided for automatically stoppingit in its upward travel and then to reverse it as soon as the partialstack has been deposited thereon.

In more specifically describing the construction of the main table 28and stack transfer mechanism associated therewith, reference is di-4rected to Figs. l, 6, 7, l1, l2 and 13. The table, as shown in crosssectional detail in Figs. 6 and 13, embodies two frame structures, oneof which is referred to as the main receiving table, and the other ofwhich is referred to as the transfer table. f Thereceiving tablecomprises the two liftin bars tti across its opposite en ds, `to whichare fixed a plurality of longitudinal I-beams it in a transversedirection with reference to the delivery of pulp. `Disposedlongitudinally of and upon these beams dit are other beams ill whichserve to support the sections of the stack of pulp as it is deliveredfrom the belts. It should be noticed that these beams di are providedwith cut-outs or recesses l2 at regular intervals, as seen in Figs. .'1and 12, which are adapted to receive the ngers of the finger tabletherein to allow the lifting of the partial stack from the nger table tothe main receiving table, as will be understood when subsequentlydescribed.

The transfer table comprises a plurality oflongitudinal f-beams d5,which rest at opposite ends on the lifting bars 35, and are joined totwo lower I-heams 4t by spacers 'l. It will be noted that there arecross members d8 fixed to the longitudinal beams 4t, and the spacers ilare xed to these cross members.

Endless chain belt conveyors 5t encircle the transfer table as noted inFig. 7, and the top runs of these belts overlie the beams 45 lengthwisethereof, which beams serve as tracks. These belts` are carried bysprocket Wheels 5 i, which are mounted on cross shafts 52, which, inturn, are mounted transversely of the table on the ends of the beams 45and t@ in bearing 53.

A slack take-up means for the conveyor chains is provided in the mediumof cross shafts 55 and 6b which are mounted on thebeams in verticallyspaced relationship, and provided with sprockets 5B and 59 respectivelyabout which the chains pass.- The shaft Sli is mounted in fixed bearings6i, and shaft 55 is mounted in movable bearings and may lie/shiftedlengthwise of the frame to maintain a desired tension on the chains.

'The shaft 80 also is the driving ,shaft for the conveyor chain belt andis driven by a chain belt connection l2 with the driven sprocket 63' ofan electric motor 63 which is mounted on a base plate 84 fixed to thebeams 46.

Four resting or supporting blocks 66 are so lo cated on the floorbeneath the main receiving table as to contact and support the transfertable as the main receiving table is lowered, to hold the transfer tableat a predetermined level while the receiving table lowers somewhatfarther. This transfers the stacks of pulp from the beams 4I tc theconveyor belts 50, and when the motor 63 is started, the stacks of pulpare transferred by the belts 50 to a' conveyor system, not shown, tomove them to desired points for baling, storage or shipment.

The linger table 31 comprises a horizontal bed formed by a plurality ofparallel, spaced fingers 10 with corresponding ends fixed rigidly tolongitudinal supporting beams 1l, which are joined tov gether byopposite end connecting channel beams 12. At opposite ends of the beams1l, spindle shafts 13 are xed by bearings 'M and on the spindles aremounted wheels 'I5 for' travel in guideways i6 which are fixed in, orformed as a part of, a carrier frame structure 13 which is supported forvertical travel and thereby serves as a means for raising and loweringthe finger table.

As will be observed by reference to Fig. 8, the frame structure l@ is ofrectangular form and at its opposite ends has bearings 80 fixed theretoand through which vertical supporting shafts 82 are threaded. Theseshafts are at what may be considered the four corners of the frame itand are revolubly mounted at their upper and lower ends respectively inbearings lit and 8d and are adapted to be rotated in unison to lower thenger table in accordance with the building up of the stack on thellingers when they are extended, and the stack is being built upthereon.

First describing the means for extending and retracting the nger table;reference being had to Figs. 6 to l0 inclusive:` An electric motor t5 isoperatively supported centrally from the under side of the longitudinalbeams "HQ of frame lt, and mounted `on the motor shaft are two beltpulleys tt and. bl.` Mounted in the frame, near its opposite ends, aretransverse screw shafts t@ and 89; these shafts being revoluble inbearings t@ fixed on the frame, and also being threaded through nuts @iilxed to and depending from the carriage 3l. At their rear ends, theshafts 88 and t@ are equipped with belt wheels td--tl that are alinedrespectively with the belt wheels 8E and 8l, and belts 95 and 96 areextended about the alined wheels to provide means whereby the motor maydrive the screw shafts to effect. the moving of the carriage betweenretracted and extended positions; the direction of travel beingdependent upon direction of rotation of the motor shaft. In retractedposition; the fingers are out of the area above the main receivingtable, and when extended they extend into this area.

As the sheets, or pieces, of pulp are delivered from between the drivenbelts it and il, they are projected so that their .forward edges engageagainst the vertical stops 26. These stops comprise flat, verticallydisposed plates, each mounted on a short supporting shaft illu that isslidable within supporting bearings lli and |02, as seen in Fig. 6, andby reference to Fig. 7, it will be observed that the bearings for thevarious stop bars are carried by and adjustable on a supporting beam |05which is slidably mounted. at its endsfor adjustment from and toward thestack, on supporting bars |06 fixed to the side frames I and Theadjustment of the beam is' effected by means of pinion gears |01 thatare xed on the ends of a cross shaft |08 which is revolubly carriedbelow the beam by bearings |05',v The gears mesh respectively with racksurfaces |09 on the under edges of the bars |06 and a lever is fixed tothe shaft to rotate it as necessary to make an adjustment of the beamand thus move all stops toward or from the stack. A spring |03 encircleseach of the shafts |00 between its supporting bearing |02 and a collar|04 that is fixed on the shaft |00, so that the stop 26 may be somewhatyieldable to the sheets or pieces'of pulp as they impinge thereon, andwill operate to bring the sheets into alinement as they come to rest onthe stack.

It is desirable also, as the various sections of a stack are built up bythe successive and simultaneous delivery of the cut sheets thereonto,that these sections be spaced apart and that the edges of the sectionsbe evenly formed. Therefore, it will be observed, by reference to Figs.6 and 7, that between the sections are spacers ||5 in the form ofthin,vertical plates, disposed longitudinally of the direction of travel ofthe sheets or pieces of pulp, whereby to insure separation of thesections and to aline the edges of the sheets as they are delivered fromthe belts I6 and I1, onto their respective sections of the stack.

These spacing plates each are strengthened and stiffened by a heavierportion ||5a which is secured thereto along its top edge, and which, inturn, is formed with a backing strip H6. The backing strip ||6 isprovided at one end with a supporting roller ||1 which is adapted fortravel along the base flange of a channel iron beam H8, which, as notedin Fig. 6, is fixed to a cross beam ||9 in the main frame. The outer endof the backing ||6 of each spacer is xed to a supporting bracket |20.The brackets, in turn, are supported by cross shafts -|22 and |23, whichare in close parallel relation and are reciprocally activated in unisonbut in opposite directions. The brackets are successively fixed to thedifferent shafts, and alternately to the same shaft. Thus, as one movesav short distance in one direction, the other operates in the oppositedirection and with every other spacer attached to opposite cross shafts,such motion will be transmitted'to the spacers so that the side edges ofthe :ect-ions of the sta-ck will be kept true and even.

Referring again to Fig. 6, it will be seen that an electric motor |30and a variable speed transmission mechanism, indicated at |3|, aremounted on the side frame structure The motor drives the transmissionmechanism through the mediacy of a sprocket chain belt |32 that operatesabout a sprocket |33 on the shaft of the motor and a sprocket |34 on thedriving shaft |3|' of the transmission mechanism. It is also observedthat there is a cross shaft |35 mounted in bearings |36, fixed to theframework of the layboy and this is driven by a connection with thetransmission mechanism comprising a sprocket chain belt |39 thatoperates about sprocket wheels |38 and |40 fixed respectively on theshaft |35 and on the drive lshaft |3| lof the transmission mechanism.

The driven cross shaft |35 is equipped at one end with a bevel gear |43,and this operates in mesh with a bevel gear |44 on a shaft |45 to drivethe shaft.

Shaft |45 extends along the frame and is revolubly supported in bearings|46, and it has two eccentrics |41 and |48 mounted thereon through thelmediacy of which the spacer cross shafts |22 and |23 are reciprocallyactuated; the operating lconnection comprising links |49 which have endsfitted about the eccentrics and pivotally attached to the ends of theshafts.

It will here be mentioned that the belts I6 and |1 are driven, aspreviously mentioned, by a connection with the transmissionmechanism;the connection comprising ja chain belt |50 that opcrates about asprocket wheel |5| xed on a drive shaft |3|a extending from thetransmission mechanism, and about a sprocket |52 fixed o shaft |53. v

The raising and lowering of the nger table 18 by the vertical, threadedshafts 82 and the raising and lowering of themain receiving table 28 bythe threaded shafts 29, is effected as follows: A variable speedtransmission mechanism |60 is mounted on the vertical end surface offrame member I0, as noted in Figs. 1 and 14, and is driven by a. chainbelt |6| operating about a sprocket wheel |62 fixed on the driving shaftof the transmission mechanism and about a sprocket wheel |63 which isfixed on a driven cross shaft |64 in the cutter |5. Mounted in thehollow frame member I0, to rotate in supporting bea-rings |69, is ashort cross shaft |61, and this is driven by the transmission mechanismby means of a chain belt |65 which operates about a sprocket wheel |66on a driven shaft extending from the transmission mechanism, and about asprocket wheel |68 on shaft |61. Also mounted. on the shaft |61 are twosprocket wheels and |1| which have driving connection with magneticclutches |12 and |13 respectively through the mediacy of chain belts |14and which are disposed about sprocket wheels |16 and |11 on the magneticclutches.

The magnetic clutch |12 is mounted on a cross shaft |80 rotatablycarried in suitable bearings |8| in the frame members I0 and the shaft|80 having bevel gears |84 xed thereon at opposite sides of the machinewhich are in driving mesh respectively with bevel gears |85 fixed on twoof the vertical shafts 29, which, as was previously stated, are providedfor the vertical adjustment of the main receiving table 28; the two`shafts 29 that are thus driven by the cross shaft |80 being thoseclosest to the cutter.

Mounted on the two shafts 29, which are thus driven directly by thecross shaft |80, at distances somewhat spaced below the bevel gears |85are bevel gears |86, and these are in operation or driving mesh withbevel gears |81 which are fixed on shafts |88, which are carried insuitable bearings |89 on the frame members I0 and and extend along theframe members, as noted in Fig. 14. Bevel gears |90, mounted on theshafts |88, are in driving mesh with bevel gears |9| on the twovertical, threaded shafts 29 at the outside of the main receiving table.By such an arrangement, all four of the vertical, threaded shafts areadapted to be rotated in the same direction and at the same speedsimultaneously to raise or to lower the main receiving table.

A further driving connection for the main receiving table 28 is providedfor reasons presently explained, and this connection comprises anelectric motor |95 mounted on the frame member l0, and connected withshaft |80 through asomar a chain belt |96 that is disposed about asprocket wheel |01 on the motor shaft and a sprocket wheel. |98 fixed onthe shaft |80.

An electric motor 200 is mounted on the frame member and has its driveshaft provided with sprocket wheels 20| and 202, about which aredisposed chain belts 203 and 204, which extend about sprocket wheels 206and 201 on cross shafts 200 and 209 respectively; the cross shafts 208and 200 being extended horizontally between the frames I0 and and aresupported in suitable bearings 2|0 in the frames, as will be noted inFig. 14. These shafts have bevel gear wheels 2 l2 fixed thereon, whichgears are in driving mesh with bevel gears 2|3 on the upper ends of thevertical, threaded shafts .02.

By such driving connection, as heretofore described, it is provided thateither the finger table 12, or the main receiving table may be adjustedby either drive connection, i. e., for the finger table, through themotor 200 with chain belts 203 and 204 about the sprockets 20| and 202to the sprockets 206 and 201, or from the transmission mechanism |60 tothe short cross shaft |01 to the shaft 208 through the chain belt 15, onthe sprockets |1| and i11 on the short cross shaft and magnetic clutch|10 respectively. Y

It is to be understood that by so rotating the shaft 208, the shaft 200will also be rotated at the same time and in the same direction andspeed through the chain belts 203 and 200 about the sprockets 206 and202, and 209 and 201; the motor 200 idling as the cross shafts 200 and20d are rotated.

. The drive connections for the main receiving table are from the motorthrough the chain belt ide about the sprockets it? on the motor and iddon the shaft 00, or through the trans-E mission itd to the short crossshaft, as explained for the nger table, thence by a chain belt ill fromthe sprocket i170 on the short cross shaft to the sprocket i 1t on'themagnetic clutch i12 on the shaft H00.

Mounted on the cross shaft itt and also on the cross shaft 20d aresprockets 220 and 2%, about which are the chain belts 222 and 22d whichoverlie sprockets 22d and 225, respectively, which are mounted upon theshafts t2@ and 22W of the table control switch mechanism 20d.

Also mounted on the cross shaft it@ is the sprocket 2.5i about whichoverlies a chain belt 252, which operates the stack height control 2ththrough the sprocket 23d.

The stack height control mechanism, as illustrated in Figs. and 19,comprises a circular dial i150 which is supported upon a cross memberM0. A shaft del is supported by a bracket fihi? on the rearward side or"the dial d50 and mounts thereon a sprocket wheei 230 about which a chainbelt travels. A worm gear 053i, mounted on the shaft del, is in drivingmesh with a pinion gear 555 which is mounted on a shaft ddl which islocated centrally of the circular dial d50. Rotatably mounted upon thisshaft 021 on the face of the dial 00 .is a smaller disk 600. .hnindicator S02 is mounted on the outer end of the shaft 050 and serves toretain the disk dtd in place. disk 060 and is fixed to the indicator002. A metal plate Q01 is fitted upon the periphery of the disk i60 soas to contact the points #i60 and i300, when rotated to the properposition.

The operation of the stack height control is as follows: As the shaft|00 is rotated, sprocket 20| .An arm i165 is adapted to engage the willdrive the chain belt 232, which. in turn, will drive the sprocket 2.34so as to rotate the shaft 05|. The worm gear 053 will drive the piniongear 456 and rotate the shaft 451. The indicator 462 lwill bemoved bythe shaft 451 and the disk 460. will be caused to revolve lwith theindicator 462. The metal plate Q61, upon contactingthe points 466 and469, will close the electrical circuit.

The table control switch is illustrated in Figs. 15, 16 and 17, inenlarged detail, and, as seen in Fig. l, is mounted on the crossmembers' IIS and |2I, and as seen in Fig. 6, is approximately centrallylocated on the machine. The table control switch comprises a housing 235of rectangular shape, within which the shafts 226 and 221 are mountedfor rotation at forward and rearward sides thereof respectively, withthe sprockets 224 and 225 xed thereon and the chain belts 222 and 223overlying these sprockets respectively. It will benoted th"at the shafts226 and 221 are threaded so as to carry the finger table limit switch238 and the table limit switch 230 respectively, in either direction,according to the direction of rotation of the shafts.

Guide shafts 240 are disposed parallel to and in the same vertical planeas the shafts 226 and 221, and the blocks 20|a and 24th, which carry theswitches 230 and 209, are mounted slidably thereon.

V'llhe toggle 202 of the finger table limit switch 230 is adapted to bethrown by the fixed stud 220 mounted in the end wall of the box 235, andthe toggle 203 of the table limit switch 230 is adapted to be' thrown bythe fixed stud 2do It will he noted that the l 20h, and also that thetoggle Edt of the table limit switch 239 is in the Sme line or plane asthe studs 2th and 20d slightly below the other plane.

As seen in Fig. l, there are start and stop press buttons 25d and 250errespectively, the table control switch 23d and the stack height control233,

and as seen in Figs. 6 and '1, there are the table up limit switch 2th,the table down limit switch 252, the pulp on chain switch 25?, the hngertable lower limit switch 25d, the finger withdraw limit switch 25h, thefinger 'out limit switch 2%, the nger clutch switch ddl, and the jogpress button 2th, which will be dealt with in connection with the wiringdiagrams in Fig. 20 and Fig. 2i, as will now be described.

llt will be here stated that there are three separate electricalcircuits in use, namely de() volts alternating current, 220 volts directcurrent and 110 volts alternating current; the 440 v. A. C. being thepower circuit operating the large motors, the 110 v. A. C. being thecontrol circuit that operates relay switches to control the powercircuit, and the 220 v. D. C. being used to operate the magneticclutches; this circuit also being operated by relay switches in the 110v. A. C. control circuit.

Referring now to Fig. 21, the line 200 represents the hot or positiveline of the 110 v. A. C. control' circuit and the line 26| representsthe return or negative line, and one side of the start press button,which is normally open, is connected to the hot line 269, and the otherside is connected to the return line 26| by the lines 262 and 263respectively, and within the line 262, a relay coil 263 is interposed.The stop press button 2590, which is normally closed, has one sideconnected to the line 262 by a line 264, and the other side connected tothe line 263 by a line 265, and within the line 265 is an auxiliaryswitch 266 that is held closed when the relay coil 263 is onceenergized. f

The finger table lower limit switch 266 has a line 268 connecting oneside of it with the line 269, and the other side is connected to theiinger Y clutch switch 251 by a line 261. the other side of which isconnected to the return line 26| by a line 219, within which a relaycoil 21| is interposed.

'I'he table limit switch 239 is connected to the hot line 269 by a line212, and this table limit switch is adapted to be closed either to an upposition or to a down position, the up contacts 293 closing a circuitthrough the line 215 to the table up limit switch 26|, the opposite sideof which is connected to the contact 216 of thevpulp on chain switch 253by a line 211, within which is a relay coil 218.

From the line 269, a line 289 connects to one side of the table downlimit switch 252, which is normally open, and the other side of thisswitch is connected by a line 28|, to the contacts 2119 of the pulp onchain switch, within which line 29| a relay coil 349 is interposed. Acircuit is completed through the contacts 282 of the table limit switch239 through the line 283 and through the line 284 to the auxiliaryswitch 296. The opposite side of this auxiliary switch 286 is connectedto the line 26| by a line 281. Within the line 294, the relay coil 285is interposed. From the contact 288 on the pulp on chain switch 253, aline 289 connects to the line 284 between the relay coil 285 and theauxiliary coil 286. From the line 283, a line 299 connects to thecontact 29| of the nger withdrawal limit switch 256. contact 292 of theiinger withdrawal limit switch 255, a line 293 connects to the contact294 of the finger table limit switch 239 within which is interposed arelay coil 295. From the contact 296 of the nger withdrawal limit switch256, a line 291 also connects to the contacts 294 of the linger tablelimit switch 238 within which a relay coil 298 is interposed. From thecontacts 399 and 39| on the iingertable limit switch 239, a line 393connects to the line 26|. It will here be st ted that the iinger tablelimit switch 239 may be losed to either an up position or a downposition as is also the table linut switch 239. The line 293 connects tothe contact 395 oi the stack height control 233. 'I'he other contact 396of the stackheight controlis connected by. a line 391 to a line 398which connects to the contact 399 of the finger table limit switch 238.Within a line 391, a relay coil 3|9 is interposed. A line 3||, connectedto the line 283, connects to an auxiliary switch 3|2, the opposite -sideof which is connected to the line 391 by a line 3|3. A line 3|5 connectsto the contacts 3|6 and 3|1 oi' a time relay mechanism 329 with the line293. This time relay mechanism 329 is a double switch arrangementwhereby one circuit will be maintained for a denite period oi' time.Then this first circuit will be opened. and a second circuit will beclosed. 'I'he switch 32| of the time relay mechanism 329 closes acircuit between the connism 326 is so adjustable as to operate theswitch4 32| to an open position, and the switch 323 to a closedposition. A line 326 connects a contact 324 of the time relay switch 329with the contact 321 of the linger out-limit switch 256. A line 329connects the contact 322 of the time relay switch 329 with the contact329 of the finger out limit switch,.and this line 328 also connects toone side of an auxiliary Lswitch 339. The other side of the auxiliaryswitch 339 is connected to the table down limit switch 252 by a line 33I. The other side of the table down limit switch 252 is connected to theline 26| by a line 333 within which a relay coil 335 is interposed. Aline 336 connects the contact 33| of the finger out limit switch to theline 398 within which a relay coil 339 is interposed. From the line 212,a line 349 connects to the jog push button 258, the other side of whichis connected by a line 34| to an auxiliary switch 342 of which the otherside is connected to the line 399 by a line 343 within which a relaycoil 345 is interposed. A line 346 is connected to the line 34| and toone side of an auxiliary switch 341, the other side of which isconnected to the line 33| by a line 348.

Now referring to Fig. 29,- which is the power circuit wiring diagram,the operation of the aforementioned relay coils in the control circuitwill be explained:

A panel board 359 mounts thereon sublpanei boards 35|, 352, 353, 354 and355, switches upon which are connected to the 440 v. A. C. power lines369, 36| and 362, which are of the usual three-line type. On the panelboard 35| are mounted two three-pole switches, 365 and 366, which havethe blades 365a, 365b and 365e and 366a, 36612 and 366e, respectively,which connect to the lines 369, 36| and 362, respectively. These bladesare adapted to be operated through the mediacy of the relay coils 338and 298, which are of the solenoid type and operate the switches toeither open or closed position. It will be noted that the wires 319, 31|and 312 are so connected tothe contacts of these switches as to reversethe polarity of the current when one switch is open and the otherclosed. The lines 315, 316 and 311 connect to the lines 319, 31| and312, and lead to the motor 385, which operates the fingers inwardly andoutwardly. It is obvious from this connection that when the switch 365is closed, the motor will run in one direction and when the switch 366is open and the switch 365 closed, the polarity of the circuit beingchanged, the motor will run in the opposite direction.

Likewise, the panel board 352 mounts thereon two three-pole switches 399and 38| which have the blades 38911., 3891 and 389C. and 38|a, 38|b and38|a, which `connect respectively with the wires 369, 36| and 362. Theseblades 38911, 389b and 389e, and 38|a, 38|b and 38|c are adapted to beoperated by the coils 345 and 295 which are ofthe solenoid type andoperate the switches to either opened or closed position. It will benoted that the wires 333, 384 and 385 are so connected as to reverse thepolarity of the circuit when one switch is open and the other closed.The lines 386, 381 and 388 connect to the lines 383, 384 and 385 andlead to the motor 299 which operates the ringer table up or down. It isobvious when the switch 399 is closed, the motor will run in onedirection, andV when the switch 380 is open and the switch 39| closed,the 'polarity of the circuit being changed, the motor will run in theopposite direction.

0n the panel board 353 are mounted the switches 399 and 39|, which havethe blades 39M, 3901) and 390e, and 39|a, 39Ib and 39|c which connectrespectively with the wires 360, 36| and 362. These blades are adaptedto be operated by the coils 335 and 218 whichare of the solenoid typeand operate the switches to either open or closed position. It will benoted that the auxiliary switch 286 is also operated by this coil 236and its operation will be to a closed position when the switch 399 isopen and to an open position when the switch 390 is operated to a closedposition. The wires 392, 393 and 3,94 are so connected to the contactsof these switches as to reverse the polarity of the circuit when oneswitch is open and the other closed. The lines 396, 396 and 331 connectto the lines 392, 393 and. 39d and lead to the motor |95 which operatesthe main receiving table upwardly and downwardly. It is obvious when theswitch 390 is closed, the motor will run in one direction, and when theswitch 390 is open and the switch 39| closed, the motor will run in theopposite direction.

0n the panel board 35A there is a three-pole switch 400 having theblades Mila, $061) and 4|||lc which connect to the lines 366, 36| and362-. This switch is adapted to be operated to an open or closedposition by the relay coil 263 which is of a solenoid type. Also, theauxiliary switch 26d is controlled by this relay coil itt. The operationof the auxiliary switch 266 will be the same as the switch tilt;specifically, to a closed position when the switch itt is closed, and toan Open po sition when the switch tu@ is open. The lines titi, a02 and603 lead to the motor itil.

On the panel board 355 is a threepole switch m5 having the three blades@ttm-wh and 6h50 which connect to the lines 36d, 36d and ttt. Thisswitch is adapted to be operated to either an open or closed position bythe relay coil it@ which is of the solenoid type. The wire iid?, ttt andit? lead to the motor t3.

Also on the panel board 35@ are the sub-panel boards dit and dii whichare connected to the lines dit and M5, which are 220 V. D. C. On thepanel board till is the double pole switch till having the lades diloand dit?) which connect to the lines did and dit. These blades areadapted to be operated to either a closed or open position bythe relaycoil 385 which is of the solenoid type. Lines dit and di@ lead from theswitch dill to the table clutch i12. 0n the panel board iii `is thetwo-pole switch 52h having blades Mila and Mtb which are connected tothe lines dit and H5 and are adapted to be op.

Verated to either closed or open position by the relay coi] 2li which isof the solenoid type. Also, under the'control ofthis relay coil 21E arethe auxiliary switches 3632 and 331. The 4switch dit@ is in an openposition, the auxiliary switch 3d?? is in an open position and theauxiliary switch 319.1 is in a closed position. When the switch d2@ isin a closed position, the auxiliary switch -iiiit will be in a closedposition and the auxiliary switch .'ldl will be in. an open position.

Assuming the layboy to be so constructed, its mode of operation would beas follows:

For a better understanding of the operation oi the layboy, thedescription of its operation will be taken up yat the point where thefingers l0 .are in extended position, and the main receiving table 28has discharged a completed stack of pulp and is ready to be elevated. Inthis position, the switches are in the following positions: Startlngswitch 266 is open, stopping switch 250a is closed; finger table lowerlimit switch 254 is closed; finger clutch switch 251 is closed; relaycoil 21| is energized, which closes the switch 420, and also closes theauxiliary switch 342 and opens the auxiliary switch 341. The table limitswitch 239 is closed to the up position across the contacts 213. Theswitch 32| in the time relay mechanism is closed; the auxiliary switch33B is open; table down limit switch 252 is closed, and the relay coil235 is dead. 'I he switch 323 isopen; the iinger out limit switch 256 isclosed across the contacts 321 and 331; the relay coil 338 is dead, andthe stack height controlv switch 233 is open. The auxiliary switch 3|2is open, the relay coil 3119 is dead, the iinger table limit switch 238is in a down position, or closed across the contacts 366 and 30|. Thefinger withdrawal limit switch 255 is closed across the contacts 29| and296, the relay coil 285 is dead, the relay coil 298 is dead, the relaycoil 285 is dead by virtue of the table limit switch 239 being in the upposition. The auxiliary switch 296 is closed by virtue of the relay coil235 being dead. 'I'he table uplimit switch 25| is open, the pulp onchain switch 253 is closed across the contacts 216 and 236, the relaycoil 218 is dead by virtue of the table up limit switch 25i being open,the table down limit switch 252 is open, and relay coil 349 is dead. v

The `first operation before starting the cutter is to close the startingswitch 25d, exciting the relay coil 263, which will close the switchddd, completing the circuit from the main power lines Litt, 36B and 362through the blades ita, will) and tte, through the lines tdi, m2, andm3, to the motor i3d. Also, the auxiliary switch 266 will be closed andheld closed, thereby energizing the circuit through the line 261i fromthe line 262 through the normally closed stop push button 25de to theline 2th. This motor it@ drives the transmission iti through the chainbelt B32 which overlies the sprockets i33 and i3d. The belts it and i1will be operated through the sprocket chain. itwhich overlies thesprockets iti and E52, which are respectively on the transmission i3dand on the shaft E53. Thus, the conveyor belts it and i1 are driven inthe direction of the arrows adjacent thereto and the pulp will bedelivered from the cutter to the fingers it.

The shaft M55 is incidentally driven by the shait E35 through the bevelgears 33 and idd, and the two eccentrics itl and it@ cause the spacershafts 622 and i2@ to reciprocate and operate the spacers as previouslystated. The shaft itt is rotated through the chain belt i3d whichoverlies the sprockets it@ and i3d' on the transmission i and the shaft|35 respectively.

With this much of the layboy in operation, the cutting and trimmingmachine i5 is started, and the pieces or pulp will be deliveredtherefrom to the conveyor belts it and i1, and thence onto the ngersit). The fingers will lower by virtue of the fact that the linger clutchVit is alive, as previously stated, driving the .finger table loweringshafts d2. This is accomplished through the transmission it@ which isdriven by the fan belt ibi which overlies the sprockets it and E63 whichare respectively on the transmission i60 and the shaft idd in thecutter. 'I he chain belt i which overlies the sprocket |66 on thetransmission it@ and overlies. the sprocket its, drives the short crossshaft B61 upon which it is dit' mounted. The nnger clutch 11i which isun

